Horseshoe



(No Model.)

J. A. MAGUIRE. Horsesho e Pat ented May 17, I881.

INVENTQR,

- ATTORw UNITED STATES PATENT OFFICE.

JoHN A. MAGUIRE, OF PHILADELPHIA, PENNSYLVANIA.

HQRSESHOQE.

SPECIFICATION forming part Of Letters Patent No. 241,681, dated May 17, 1881.

Application filed March 7, 1881.

To all whom it may concern;

Be it known that I, JOHN A. MAGUIRE, a citizen of the United States, resident of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements. in Adjustable Ualks for Horseshoes, of which the following is a specification. n.

Referring to the accompanying drawings, Figure 1 is a plan of a shoe, illustrating my improvements as applied thereto. Fig. 2 is a detail perspective of one of the ends of the shoe, showing the calk removed and the piv oted tongue thrown back. Fig. 3 is a perspective of one of my improved removable calks. Fig. 4 is a detail perspective of one end of the shoe, showing the calk for the same fastened in position. Fig. 5 is a horizontal section of the same, and Fig. 6 is a horizontal section of a shoe illustrating a modification of my invention.

My invention has for its object to provide a removable calk for horse and mule shoes; and my improvements consistin the peculiar construction and combination of parts hereinafter set forth, having reference particularly to forming the shank of the calk square and rabbeted, and to fastenin g the same in the shoe by means of a pin which is kept in place and protected from injury by a sprin g-fastenin g on the shoe.

Referring to the accompanying drawings, A represents a horse or mule shoe having three mortise-openings, a a a respectively, for the reception of the removable calks. The inner side of the shoe adjacent to the mortise-openings is recessed for the reception of pivoted tongues B, which are provided with springs 12,

whereby they are caused to exert an inward spring-pressure on the pins E.

D represents the removable calks, which are formed withsquare shanks d, rabbeted at 01, so as to form two shoulders, 11 d respectively. The mortised openings of the plate or-shoe A are countersunk, as shown at a, thus giving the calks a double bearing and preventing them from being driven up or wed gin g in said shoes. The shanks of thecalks are alsoformed with transverse openings (1 for the reception (N0 model.)

drawn. The oalks may thenb pulled out of the openings in the plate or shoe A.

A modification is shown in Fig. 6, wherein the fastening-pins, instead of entering transversely, as in Fig. 1, have their movement lengthwise of the shoe,and are urged forward by the spiral springs F. In this modification the pins are provided with lateral shanks f, which pass through transverse openings g in the side of the shoe. By taking hold of these shanks thefastening-pins f may be moved as required. To protect the openings 9, plates G are attached to the shanks f, so as to move therewith, and are held in place on the latter by nuts 9 g. The fastening-pins in this. modification are substantially spring-bolts. Topjermit their introduction in the shoe, the openings in which they move must extend out to the edge or ends of the shoe. Such openings may be closed at one end by plugs or screws h h.

What I claim as my invention is as follows:

1. The mortised shoe A, having recessed sides and spring-tongues, substantially as shown and described.

2. The combination of plate or shoe A, having mortises a and lateral slots 9, calks I), having angular rabbeted shanks, with transverse openings (1 fastening-pins E, and springtongues B, substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand this 3d day of 

